Digital is a method of representing information using a series of binary digits, typically denoted as 0 and 1. This form of representation can be used for various types of information, including data or digital versions of analog signals, such as speech.

The binary digits, 0 and 1, can be transmitted through various means:

1. Wired Network: In a wired network, digital data is often transmitted by converting these binary digits into a series of electronic pulses. These pulses travel through conductive wires or cables to transmit the information from one point to another.
2. Optical Fiber Network: In an optical fiber network, digital data is converted into pulses of optical light. These pulses of light travel through specialized fiber-optic cables, which are made of glass or plastic fibers, to transmit the data over long distances. Optical fiber offers high-speed and high-capacity data transmission.
3. Wireless Transmission: In wireless communication, digital data can be superimposed on radio waves, which are electromagnetic waves, and transmitted through the air. This wireless transmission can be used for various purposes, including mobile communication, Wi-Fi networks, and satellite communication.

Digital representation offers several advantages, including the ability to transmit, store, and manipulate data with high accuracy and reliability. It also enables various forms of data compression, encryption, and error correction techniques to enhance data transmission and storage efficiency. Digital communication has become a fundamental part of modern telecommunications, computing, and information technology systems.